CN108282248A

CN108282248A - A kind of data transmission method, network side equipment and user equipment

Info

Publication number: CN108282248A
Application number: CN201710008345.5A
Authority: CN
Inventors: 刘佳敏; 皮埃尔; 许芳丽
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-01-05
Filing date: 2017-01-05
Publication date: 2018-07-13
Anticipated expiration: 2037-01-05
Also published as: CN108282248B; WO2018127225A1

Abstract

A kind of data transmission method of present invention offer, network side equipment and user equipment, the data transmission method include：The PDCP layers of network side handle high level data packet, obtain PDCP PDU, are sent to H layers of RLC, every at least one RLC H layers an of PDCP layers of correspondence；PDCP PDU processing of H layers of the RLC to receiving, obtains RLC PDU, and RLC PDU are sent to L layers of RLC, at least one RLC L layers of correspondences of H layers of every RLC；L layers of RLC PDU processing that will be received of RLC, obtain RLC PDU or segmentation, are sent to MAC layer, every RLC one MAC layer of L layers of correspondence；MAC layer handles the RLC PDU received or segmentation, obtains MAC PDU, is sent to the sides UE.Network efficiency can be improved in the present invention.

Description

A kind of data transmission method, network side equipment and user equipment

Technical field

The present invention relates to a kind of field of communication technology more particularly to data transmission method, network side equipment and user equipmenies.

Background technology

In mobile communication system future development, in order to better meet user demand, significant increase network capacity and handle up Amount, will can introduce more transmission nodes, i.e., following is super-intensive network.In super-intensive network, in order to realize high-transmission Rate can take high frequency small station to cover.In such scene, dual link or more may be used in high frequency small station dense deployment Interconnection technique, i.e. UE (User Equipment, user equipment) obtain data transmission by two or two or more links.

In existing communication system, the data transmission between UE and eNB (evolved Node B, evolved base station), Generally go through PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol), RLC (Radio Link Control, radio link layer control protocol), MAC (Media Access Control, medium access control) and PHY The transmission of (Physical Layer, physical layer).As shown in Figure 1, for the user face protocol stack in existing mobile communication system.Often One layer is completed different data processings.PDCP mainly carries out safety operation and compressed and decompressed processing, for example, encryption with it is complete Whole property protection, ROHC (Robust Header Compression, robustness Header compression) compression and decompression etc.；RLC is main It completes the segmentation cascade of data and sequentially submits and ARQ (Automatic Repeat Request, automatic repeat request) data Transmission guarantee；MAC mainly completes scheduling and the cascade of Different Logic channel processing and HARQ (Hybrid Automatic Repeat Request, hybrid automatic repeat-request) operation；Physical layer is completed transmission block and is sent at wrapping and eating dishes without rice or wine.

Referring to FIG. 2, in the framework of dual link, user data can carry out shunting processing between different eNB.

In the prior art, every logic channel corresponds to three layers of L2 fructifications (PDCP, RLC and MAC).The single connection the case where Under, each logic channel possesses independent PDCP and rlc layer, and is multiplexed MAC layer, and it is direct between reciprocity end that RLC carries out it Feedback and re-transmission.And in the case of dual link carrying separation (Split Bearer), each logic channel has independent PDCP Layer, each link possesses the rlc layer of oneself under PDCP layer, and the rlc layer of each of the links independently carry out it is respective instead Feedback and re-transmission.

Above two in the prior art, be not present the transmission state of two or more link is integrated The case where processing, lacks the cooperation for feeding back and retransmitting, and when a link is deteriorated, cannot remedy in time, reduce network Efficiency.

Invention content

In view of this, a kind of data transmission method of present invention offer, network side equipment and user equipment, to improve network Efficiency.

In order to solve the above technical problems, the present invention provides a kind of data transmission method, it is applied to network side, including：

PDCP layers of Packet Data Convergence Protocol handles the high level data packet received, obtains PDCP PDU, concurrently Give RLC-H layers, wherein an every PDCP layers of correspondence is RLC-H layers at least one；

The described RLC-H layers PDCP PDU processing to receiving obtains RLC PDU, and RLC PDU is sent to RLC-L layers, wherein an every RLC-H layers of correspondence is RLC-L layers at least one；

The described RLC-L layers RLC PDU processing that will be received obtains RLC PDU or RLC PDU segmentations, and sends To MAC layer, wherein one MAC layer of an every RLC-L layers of correspondence, each MAC layer corresponds to RLC-L layers at least one；

The MAC layer handles RLC PDU or RLC the PDU segmentations received, obtains MAC PDU, and be sent to The sides UE.

Preferably, an every RLC-H layers of at least two RLC-L layers of correspondence.

Preferably, the step of RLC PDU are sent to RLC-L layers by described RLC-H layers include：

Described RLC-H layers shunts RLC PDU, and the RLC PDU after shunting are sent respectively at least two RLC-L layers；Or

Described RLC-H layers is replicated RLC PDU, and the RLC PDU after duplication are sent respectively at least two RLC-L layers；Or

Described RLC-H layers selects a link from least both links, and RLC PDU are sent to the link pair of selection The RLC-L layers answered.

Preferably, described PDCP layers the high level data packet received is handled, obtains PDCP PDU, and be sent to RLC-H layers of the step of include：

Caching step：Described PDCP layers handles the high level data packet received, obtains PDCP SDU, and by PDCP SDU is stored in caching；

Pre-treatment step：Described PDCP layers obtains the first quantity PDCP SDU from the caching, to first number Amount PDCP SDU processing, wherein including distributing SN for the first quantity PDCP SDU, obtain PDCP PDU；

Forwarding step：PDCP PDU are sent to RLC-H layers by described PDCP layers；

Supplement step：When the second quantity MAC PDU quilts in the corresponding MAC PDU of the first quantity PDCP SDU When transmission, the pre-treatment step is returned.

Preferably, first quantity determines in the following ways：

First quantity=N1 × GBR, wherein N1 is positive integer；Or

First quantity=N1 × PBR, wherein N1 is positive integer；Or

First quantity=N1 × M, wherein N1 is positive integer, the actual amount of data of M each TTI scheduling before being.

Preferably, the described RLC-H layers PDCP PDU processing to receiving, obtains RLC PDU, and by RLC PDU The step of being sent to RLC-L layers include：

Caching step：The described RLC-H layers PDCP PDU processing to receiving, obtains RLC SDU, and by RLC SDU is stored in caching；

Pre-treatment step：Described RLC-H layers obtains third quantity RLC SDU from the caching, and to the third Quantity RLC SDU processing distributes SN including for the third quantity RLC SDU, obtains RLC PDU；

Forwarding step：RLC PDU are sent to RLC-L layers by described RLC-H layers；

Supplement step：The 4th quantity MAC PDU quilts in the corresponding MAC PDU of the third quantity RLC SDU When transmission, the pre-treatment step is returned.

Preferably, the third quantity determines in the following ways：

Third quantity=N2 × GBR, wherein N2 is positive integer；Or

Third quantity=N2 × PBR, wherein N2 is positive integer；Or

Third quantity=N2 × M, wherein N2 is positive integer, the actual amount of data of M each TTI scheduling before being.

Preferably, the described RLC-L layers RLC PDU processing that will be received obtains RLC PDU or RLC PDU segmentations, And the step of being sent to MAC layer, includes：

Described RLC-L layers is stored in the RLC PDU received in caching；

When the transmission opportunity of the MAC layer reaches, the described RLC-L layers RLC PDU processing by caching obtains RLC PDU or RLC PDU segmentations, and it is sent to the MAC layer.

Preferably, the data transmission method further includes：

When the packet loss state report of the described RLC-H layers rlc layer feedback for receiving the sides UE, the packet loss state report is determined In the RLC PDU or RLC PDU that retransmits of needs specified be segmented；RLC PDU or RLC the PDU segmentations for needing to retransmit are obtained, and It is sent to RLC-L layers；

RLC PDU or RLC the PDU segmentations that the needs received retransmit are sent to MAC layer by described RLC-L layers；

The MAC layer handles RLC PDU or RLC the PDU segmentations that the needs received retransmit, and obtains MAC PDU, and it is sent to the sides UE.

Preferably, described to need in the RLC PDU or RLC PDU retransmitted segmentations and/or RLC-H layers connect with RLC-L layers Message breath includes being used to indicate current RLC PDU or RLC PDU to be segmented into the label for retransmitting packet.

Preferably, an every RLC-H layers of at least two RLC-L layers of correspondence, it is described to obtain the RLC PDU or RLC for needing to retransmit PDU is segmented, and the step of being sent to RLC-L layers includes：

The described RLC-H layers link for selecting link circuit condition to be better than other links from least both links, and by RLC The link that PDU is sent to selection is RLC-L layers corresponding.

Preferably, described RLC-L layers RLC PDU or RLC the PDU segmentations that the needs received retransmit are sent to The step of MAC layer of the corresponding network side includes：

Described RLC-L layers receive it is described need the RLC PDU or RLC PDU retransmitted segmentations when, preferentially by the need RLC PDU or RLC the PDU segmentations to be retransmitted are sent to the MAC layer.

Preferably, the data transmission method be applied to CU-DU frameworks wireless-transmission network, described PDCP layer with it is described RLC-H layers are located in CU；Described RLC-L layers is located at MAC layer in DU；Or

The data transmission method is applied to the wireless-transmission network of NR dual links or multi-connection framework, described PDCP layer with Described RLC-H layers is located in MeNB；Or

The data transmission method is applied to the wireless-transmission network of NR-LTE interworking frameworks, the PDCP Layer is located at described RLC-H layers in NR MeNB.

The present invention also provides a kind of data transmission methods, are applied to the sides UE, including：

MAC PDU processing of the MAC layer to receiving obtains RLC PDU or RLC PDU segmentations, and is sent to correspondence Rlc layer, wherein each rlc layer corresponds to multiple MAC layers；

The rlc layer carries out integrated treatment to RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent, and obtains To complete RLC PDU, and PDCP PDU are obtained from complete RLC PDU, and PDCP PDU are sent to PDCP layers, In, each rlc layer corresponds to a PDCP layers, at least one rlc layer of an every PDCP layers of correspondence；

Described PDCP layers, to receiving PDCP PDU processing, obtains PDCP SDU, and be forwarded to high level.

Preferably, the rlc layer integrates RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent The step of processing includes：

The rlc layer is ranked up RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent, according to row Sequence result judges whether packet loss, and when there are packet loss, packet loss state report is sent to the RLC-H layers of network side.

Preferably, the rlc layer arranges RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent Sequence, the step of judging whether packet loss according to ranking results include：

The rlc layer according to the RLC PDU or RLC PDU segmentation received sequence number, to the RLC PDU that receive or RLC PDU segmentations are ranked up, and judge whether RLC PDU or RLC the PDU segmentations of sequence number missing；

When RLC PDU or RLC the PDU segmentations lacked there are sequence number, start the timer that reorders；

When the timer expiry that reorders, when not receiving RLC PDU or RLC the PDU segmentations of the sequence number missing yet, There are packet losses for judgement.

PDCP layers handle the high level data packet received, obtain PDCP PDU, and be sent to rlc layer, wherein every One PDCP layers of at least one rlc layer of correspondence；

PDCP PDU processing of the rlc layer to receiving, obtains RLC PDU or RLC PDU segmentation, and by RLC PDU or RLC PDU segmentations are sent to MAC layer, wherein each rlc layer corresponds at least two MAC layers；

The MAC layer handles RLC PDU or RLC the PDU segmentations received, obtains MAC PDU, and be sent to Network side.

Preferably, the data transmission method further includes：

When the rlc layer receives the packet loss state report of RLC-H layers feedback of network side, the packet loss state report is determined RLC PDU or RLC the PDU segmentations that the needs specified in announcement retransmit；RLC PDU or RLC the PDU segmentations for needing to retransmit are obtained, And it is sent to MAC layer；

The MAC layer handles RLC PDU or RLC the PDU segmentations that the needs received retransmit, and obtains MAC PDU, and it is sent to network side.

Preferably, described to obtain RLC PDU or RLC the PDU segmentations for needing to retransmit, and the step of being sent to MAC layer is wrapped It includes：

The rlc layer obtains the link of nearest ascending resource, and will need RLC PDU or RLC the PDU segmentations retransmitted It is sent to the corresponding MAC layer of link of the nearest ascending resource.

The present invention also provides a kind of data transmission methods, are applied to network side, including：

MAC PDU processing of the MAC layer to receiving obtains RLC PDU or RLC PDU segmentations, and is sent to correspondence RLC-L layers, wherein each MAC layer corresponds to RLC-L layers at least one, one MAC layer of an every RLC-L layers of correspondence；

RLC PDU or RLC the PDU segmentations received are passed through RLC-H layers by described RLC-L layers, wherein every RLC-H Corresponding at least one RLC-L layers of layer；

Described RLC-H layers is handled receiving RLC PDU or RLC PDU segmentations, obtains complete RLC PDU, and PDCP PDU are obtained from complete RLC PDU, and PDCP PDU are sent to PDCP layers, wherein an every RLC-H layers of correspondence one PDCP layers, an every PDCP layers of correspondence is RLC-H layers at least one；

Preferably, an every RLC-H layers of at least two RLC-L layers of correspondence, described RLC-H layers to receiving RLC PDU or RLC PDU segmentations the step of being handled, obtaining complete RLC PDU includes：

Described RLC-H layers carries out integrated treatment to RLC PDU or RLC the PDU segmentations for receiving different RLC-L layers of transmissions, Obtain complete RLC PDU.

Preferably, the step of described RLC-H layers handles the RLC PDU or RLC PDU segmentation received include：

RLC PDU or RLC the PDU segmentations of the described RLC-H layers different RLC-L layers of transmission to receiving are ranked up, root Packet loss is judged whether according to ranking results, and when there are packet loss, packet loss state report is sent to the rlc layer of the sides UE.

Preferably, RLC PDU or RLC the PDU segmentations of the described RLC-H layers different RLC-L layers of transmission to receiving carry out Sequence, the step of judging whether packet loss according to ranking results include：

The described RLC-H layers sequence number according to RLC PDU or RLC the PDU segmentations received, to the RLC PDU received Or RLC PDU segmentations are ranked up, and judge whether RLCPDU the or RLC PDU segmentations of sequence number missing；

The present invention also provides a kind of network side equipments, including：

PDCP layers, for handling the high level data packet received, PDCP PDU are obtained, and be sent to RLC-H layers, Wherein, an every PDCP layers of correspondence is RLC-H layers at least one；

RLC-H layers, for the PDCP PDU processing to receiving, RLC PDU are obtained, and RLC PDU are sent to It is RLC-L layers at least one, wherein an every RLC-H layers of correspondence is RLC-L layers at least one；

RLC-L layers, the RLC PDU processing for will receive obtains RLC PDU or RLC PDU segmentations, and sends To MAC layer, wherein one MAC layer of an every RLC-L layers of correspondence, each MAC layer corresponds to RLC-L layers at least one；

MAC layer obtains MAC PDU, and be sent to for handling RLC PDU or RLC the PDU segmentations received The sides UE.

Preferably, include for described RLC-H layers：

First routing module is sent respectively at least for shunting RLC PDU, and by the RLC PDU after shunting Two RLC-L layers；Or

Secondary route module is sent respectively at least for replicating RLC PDU, and by the RLC PDU after duplication Two RLC-L layers；Or

RLC PDU for selecting a link from least both links, and are sent to selection by third routing module Link is RLC-L layers corresponding.

Preferably, include for described PDCP layers：

First cache module, the high level data packet for will receive are handled, and obtain PDCP SDU, and by PDCP SDU is stored in caching；

First preprocessing module, for obtaining the first quantity PDCP SDU from the caching, to first quantity A PDCP SDU processing distributes SN including for the first quantity PDCP SDU, obtains PDCP PDU；

First sending module, for PDCP PDU to be sent to RLC-H layers；

Complementary module, for as the second quantity MAC in the corresponding MAC PDU of the first quantity PDCP SDU When PDU is sent, controls first preprocessing module and the first sending module works on.

Preferably, first quantity determines in the following ways：

First quantity=N1 × GBR, wherein N1 is positive integer；Or

First quantity=N1 × PBR, wherein N1 is positive integer；Or

Preferably, include for described RLC-H layers：

Second cache module obtains RLC SDU, and RLC SDU are deposited for the PDCP PDU processing to receiving It is stored in caching；

Second preprocessing module, for obtaining third quantity RLC SDU from the caching, and to the third quantity A RLC SDU processing distributes SN including for the third quantity RLC SDU, obtains RLC PDU；

Second sending module, for RLC PDU to be sent to RLC-L layers；

Second complementary module, for when the 4th quantity in the corresponding MAC PDU of the third quantity RLC SDU When MAC PDU are sent, controls second preprocessing module and the second sending module works on.

Preferably, the third quantity determines in the following ways：

Third quantity=N2 × GBR, wherein N2 is positive integer；Or

Third quantity=N2 × PBR, wherein N2 is positive integer；Or

Preferably, include for described RLC-L layers：

Cache module, the RLC PDU for will receive are stored in caching；

Sending module, for when the transmission opportunity of the MAC layer reaches, the RLC PDU processing of caching to obtain RLC PDU or RLC PDU segmentations, and it is sent to the MAC layer.

Preferably, RLC-H layers described, it is additionally operable to, in the packet loss state report for the rlc layer feedback for receiving the sides UE, determine RLC PDU or RLC the PDU segmentations that the needs specified in the packet loss state report retransmit；Obtain the RLC PDU for needing to retransmit Or RLC PDU segmentations, and it is sent to RLC-L layers；

It is RLC-L layers described, it is additionally operable to RLC PDU or RLC the PDU segmentations that the needs received retransmit being sent to MAC layer；

The MAC layer is additionally operable to handle RLC PDU or RLC the PDU segmentations that the needs received retransmit, MAC PDU are obtained, and are sent to the sides UE.

Preferably, an every RLC-H layers of at least two RLC-L layers of correspondence,

It is RLC-H layers described, it is additionally operable to the link for selecting a link circuit condition to be better than other links from least both links, And the link that RLC PDU are sent to selection is RLC-L layers corresponding.

Preferably, RLC-L layers described, it is additionally operable to receiving RLC PDU or RLC the PDU segmentations for needing to retransmit When, RLC PDU or RLC the PDU segmentations for needing to retransmit preferentially are sent to the MAC layer.

Preferably, the network side equipment be applied to CU-DU frameworks wireless-transmission network, described PDCP layer with it is described RLC-H layers are located in CU；Described RLC-L layers is located at MAC layer in DU；Or

The network side equipment is applied to the wireless-transmission network of NR dual links or multi-connection framework, described PDCP layers and institute RLC-H layers are stated to be located in MeNB；Or

The network side equipment is applied to the wireless-transmission network of NR-LTE interworking frameworks, PDCP layers described It is located in NR MeNB with described RLC-H layers.

The present invention also provides a kind of user equipmenies, including：

MAC layer obtains RLC PDU or RLCPDU segmentations, and be sent to for the MAC PDU processing to receiving Corresponding rlc layer, wherein each rlc layer corresponds to multiple MAC layers；

Rlc layer, RLC PDU or RLC the PDU segmentations for being sent to the different MAC layers received carry out integrated treatment, Complete RLC PDU are obtained, and obtain PDCPPDU from complete RLC PDU, and PDCP PDU are sent to PDCP layers, In, each rlc layer corresponds to a PDCP layers, at least one rlc layer of an every PDCP layers of correspondence；

PDCP layers, for receiving PDCP PDU processing, obtaining PDCP SDU, and be forwarded to high level.

Preferably, the rlc layer is additionally operable to RLC PDU or RLC the PDU segmentations sent to the different MAC layers received It is ranked up, packet loss is judged whether according to ranking results, when there are packet loss, packet loss is sent to the RLC-H layers of network side State report.

Preferably, the rlc layer is additionally operable to the sequence number according to RLC PDU or RLC the PDU segmentations received, docking RLC PDU or RLC the PDU segmentations received are ranked up, and judge whether PDU points of the RLC PDU or RLC of sequence number missing Section；When RLC PDU or RLC the PDU segmentations lacked there are sequence number, start the timer that reorders；When the timer that reorders is super When, when not receiving RLC PDU or RLC the PDU segmentations of the sequence number missing yet, there are packet losses for judgement.

The present invention also provides a kind of user equipmenies, including：

PDCP layers, for handling the high level data packet received, PDCP PDU are obtained, and be sent to rlc layer, In, at least one rlc layer of an every PDCP layers of correspondence；

Rlc layer obtains RLC PDU or RLC PDU segmentations for the PDCP PDU processing to receiving, and by RLC PDU or RLC PDU segmentations are sent to MAC layer, wherein each rlc layer corresponds at least two MAC layers；

MAC layer obtains MAC PDU, and be sent to for handling RLC PDU or RLC the PDU segmentations received Network side.

Preferably, the rlc layer determines when being additionally operable to receive the packet loss state report of the RLC-H layers feedback of network side RLC PDU or RLC the PDU segmentations that the needs specified in the packet loss state report retransmit；Obtain the RLC PDU for needing to retransmit Or RLC PDU segmentations, and it is sent to MAC layer；

The MAC layer is additionally operable to handle RLC PDU or RLC the PDU segmentations that the needs received retransmit, MAC PDU are obtained, and are sent to network side.

Preferably, the rlc layer is additionally operable to obtain the link of nearest ascending resource, and the RLC PDU that needs are retransmitted Or RLC PDU segmentations are sent to the corresponding MAC layer of link of the nearest ascending resource.

MAC layer obtains RLC PDU or RLC PDU segmentations, and be sent to for the MAC PDU processing to receiving It is RLC-L layers corresponding, wherein each MAC layer corresponds to RLC-L layers at least one, one MAC layer of an every RLC-L layers of correspondence；

RLC-L layers, RLC PDU or RLC the PDU segmentations for will receive pass through RLC-H layers corresponding, wherein every One RLC-H layers of correspondence is RLC-L layers at least one；

It RLC-H layers, is handled for being segmented to RLC PDU or the RLC PDU received, obtains complete RLC PDU, And PDCP PDU are obtained from complete RLC PDU, and PDCP PDU are sent to the PDCP layers of the network side, wherein it is every One rlc layer corresponds to a PDCP layers, and an every PDCP layers of correspondence is RLC-H layers at least one；

It is RLC-H layers described, it is additionally operable to carry out RLC PDU or RLC the PDU segmentations for receiving different RLC-L layers of transmissions comprehensive Conjunction is handled, and obtains complete RLC PDU.

Preferably, RLC-H layers described, it is additionally operable to PDU points of the RLC PDU or RLC to receiving different RLC-L layers of transmissions Section is ranked up, and packet loss is judged whether according to ranking results, and when there are packet loss, packet loss shape is sent to the rlc layer of the sides UE State is reported.

Preferably, RLC-H layers described, it is additionally operable to the sequence number according to RLC PDU or RLC the PDU segmentations received, it is right RLC PDU or RLC the PDU segmentations received are ranked up, and judge whether RLC PDU or the RLC PDU of sequence number missing Segmentation；When RLC PDU or RLC the PDU segmentations lacked there are sequence number, start the timer that reorders；When the timer that reorders Time-out, when not receiving RLC PDU or RLC the PDU segmentations of the sequence number missing yet, there are packet losses for judgement.

The above-mentioned technical proposal of the present invention has the beneficial effect that：

RLC-H layers of network side and the rlc layer of the sides UE can carry out integrated treatment to the situation on mulitpath, for example, more The selection of paths, the reception of the data on mulitpath sequence, recombination, feedback of status and re-transmission, to promote network effect Rate.

Description of the drawings

Fig. 1 is the user face protocol stack in existing mobile communication system；

Fig. 2 is the radio protocol architecture of existing dual link；

Fig. 3 is the flow diagram of the data transmission method of the embodiment of the present invention one；

Fig. 4 is the structural schematic diagram of PDCP PDU；

Fig. 5 is the method schematic diagram of the caching mechanism of the PDCP layers of the network side of the embodiment of the present invention；

Fig. 6 is the structural schematic diagram of RLC PDU；

Fig. 7 is the method schematic diagram of the caching mechanism of the RLC-H layers of the network side of the embodiment of the present invention；

Fig. 8 is the flow diagram of the data transmission method of the embodiment of the present invention two；

Fig. 9 is the flow diagram of the data transmission method of the embodiment of the present invention three；

Figure 10 is the flow diagram of the data transmission method of the embodiment of the present invention four；

Figure 11 is the flow diagram of the data transmission method of the embodiment of the present invention five；

Figure 12 is the flow diagram of the data transmission method of the embodiment of the present invention six；

Figure 13 is the structural schematic diagram of the wireless-transmission network of the CU-DU frameworks of the embodiment of the present invention seven；

Figure 14 is the structural schematic diagram of the NR dual links of the embodiment of the present invention eight or the wireless-transmission network of multi-connection framework；

Figure 15 is the structural representation of the wireless-transmission network of the NR-LTE interworking frameworks of the embodiment of the present invention nine Figure；

Figure 16 is the Organization Chart of the network side equipment of the embodiment of the present invention ten；

Figure 17 is the Organization Chart of the user equipment of the embodiment of the present invention 11.

Specific implementation mode

Below in conjunction with drawings and examples, the specific implementation mode of the present invention is described in further detail.Following reality Example is applied for illustrating the present invention, but is not limited to the scope of the present invention.

The network side equipment framework involved by the embodiment of the present invention is illustrated first.

Network side equipment in the embodiment of the present invention includes PDCP layers, RLC-H layers, RLC-L layers and MAC layer, i.e., will be existing Rlc layer be divided into RLC-H (RLC-High) entities and RLC-L (RLC-Low) entity, wherein RLC-H layers are mainly responsible for data It sequentially submits and ARQ (Automatic Repeat Request, automatic repeat request) data transmission guarantee, RLC-L layers main It is responsible for the segmentation cascade of data.Wherein, an every PDCP layers of correspondence is RLC-H layers at least one, and an every RLC-H layers of correspondence is at least one RLC-L layers, one MAC layer of an every RLC-L layers of correspondence, each MAC layer corresponds to RLC-L layers at least one.

Embodiment one

Referring to FIG. 3, the embodiment of the present invention one provides a kind of data transmission method, which is applied to net The downlink of network side just passes transmission, and the data transmission method includes：

Step 31：The PDCP layers of network side handle the high level data packet received, obtain PDCP PDU (Protocol Data Unit, protocol Data Unit), and it is sent to the RLC-H layers of network side, wherein an every PDCP layers of correspondence It is RLC-H layers at least one；

Step 32：The described RLC-H layers PDCP PDU processing to receiving, obtains RLC PDU, and by RLC PDU It is sent to the RLC-L layers of network side, wherein an every RLC-H layers of correspondence is RLC-L layers at least one；

Step 33：The described RLC-L layers RLC PDU processing that will be received obtains RLC PDU or RLC PDU segmentations, And it is sent to the MAC layer of network side, wherein one MAC layer of an every RLC-L layers of correspondence, each MAC layer correspond at least one RLC- L layers；

Step 34：The MAC layer handles RLC PDU or RLC the PDU segmentations received, obtains MAC PDU, and It is sent to the sides UE.

In the embodiment of the present invention, it is preferable that every one RLC-H layers of a PDCP layers of correspondence, that is, PDCP layers and RLC-H layers one One corresponds to, and only there are one RLC-H on each logic channel.

In the embodiment of the present invention, it is preferable that an every RLC-H layers of at least two RLC-L layers of correspondence, i.e., every RLC-H are corresponded to At least two paths (leg), to which RLC-H layer can be to the progress integrated treatment of the situation on mulitpath, for example, can be with Consider the link-quality of mulitpath, the path transmission data for selecting link-quality best transmit out data as early as possible It goes.In addition, when the link-quality of a wherein paths is deteriorated, it can also in time be switched on another path, be remedied, from And user experience can be promoted, it is also beneficial to the promotion of network efficiency.

The process to data of PDCP layers, RLC-H layers, RLC-L layers and MAC layer is described in detail separately below.

PDCP layers mainly carry out safety operation and compressed and decompressed processing, such as encryption and integrity protection, ROHC (Robust Header Compression, robustness Header compression) compression and decompression etc., specifically includes：

1) it is that PDCP SDU (Service Data Unit) distribute SN (sequence number), each SDU corresponds to unique SN, and sequentially Distribution；

2) according to configuration, data packet is compressed into wardrobe；

3) according to configuration, safety operation, including integrity protection and encryption are carried out to data packet.

PDCP handles the high level data packet received, obtains PCDP SDU, is packaged, obtains to PDCP SDU PDCP PDU (Service Data Unit), referring to FIG. 4, Fig. 4 is the structural schematic diagram of PDCP PDU, figure 4, it is seen that PDCP PDU are made of PDCP SDU and PDCP header.

PDCP layers have the function of Discard (discarding) to data packet, i.e., when data packet (abandons meter in Discard timer When device) after time-out when not sent still, need to delete the data packet, and if the data packet of time-out has been allocated for PDCP SN simultaneously pass through PDCP layers, or even have arrived at the SN that rlc layer is assigned in rlc layer, then the deletion of the data packet will cause There is notch in entire SN sequences, and additional mechanism is needed to carry out the confirmation of receiving-transmitting sides feelings as to this.It is complicated in order to avoid introducing Receiving-transmitting sides to the interactive process of deletion event, in the embodiment of the present invention, avoided with the following method to having been allocated for The data packet of PDCP SN is deleted：

Referring to FIG. 5, the PDCP layers of the network side handle the high level data packet received, PDCP is obtained PDU, and the step of being sent to the RLC-H layers of network side may include：

Caching step 51：Described PDCP layers handles high level data packet, obtains PDCP SDU, and PDCP SDU are deposited It is stored in caching；

Pre-treatment step 52：Described PDCP layers obtains the first quantity PDCP SDU from the caching, to described first Quantity PDCP SDU processing distributes SN including for the first quantity PDCP SDU, obtains PDCP PDU；

Forwarding step 53：PDCP PDU are sent to RLC-H layers by described PDCP layers；

Supplement step 54：Judge the second quantity MAC in the corresponding MAC PDU of the first quantity PDCP SDU When whether PDU is sent, if so, returning to the pre-treatment step 52, otherwise, supplement step 54 is continued to execute.

The effect of supplement step is once the data packet portions for having carried out PDCP processing are transmitted, then according to advanced elder generation The sequence gone out continues to carry out PDCP processing to the remainder data packet in caching, ensures the data packet that PDCP processing has been carried out It can carry out eating dishes without rice or wine to send enough, not influence transmission rate.

Further include after the caching step 51：

Described PDCP layers judges whether the PDCP SDU being stored in caching are overtime, as the PDCP SDU being stored in caching Time-out directly deletes the PDCP SDU for being stored in the time-out in caching.

In the embodiment of the present invention, PDCP layers, when receiving high level data packet, do not carry out PDCP layers of processing at once, and It is the form of one PDCP SDU to be stored in caching, and only the fraction PDCP SDU to be stored in caching distribute SN, And RLC-H layers are sent to, these data packets can be soon passed away, then be sequentially to remaining SDU in caching again Distribute SN.When a certain data packet time-out, directly the data packet can be removed from the cache, due to the number being stored in caching It is not previously allocated SN according to coating, thus the deletion of the data packet will not cause entire SN sequences notch occur, also just no longer need Additional mechanism is wanted to carry out the confirmation of receiving-transmitting sides feelings as to this.

For example, if the high level data packet 1-5 being currently received, can be first the first two distribution SN be 1 and 2, press It is sent according to scheduling, remaining 3 are stored in caching, if in this process, the 3rd data packet time-out then can be with It is directly removed from the cache, beginning SN is unwrapped marked as 3 to the 4th data ... so that the SN of PDCP PDU is continuous, There is no Gap (notch) to need to handle.

Above-mentioned first quantity can determine according to current scheduling information and/or transmission situation, specifically, may be used with Under type determines：

1) the first quantity=N1 × GBR (ensureing bit rate), wherein N1 is positive integer；Or

2) the first quantity=N1 × PBR (priority bit rate), wherein N1 is positive integer；Or

3) the first quantity=N1 × M, wherein N1 is positive integer, M each TTI (Transmission Time Interval) scheduling before being Actual amount of data.

The first number of data packet that above-mentioned calculation can ensure to have carried out PCDP processing disclosure satisfy that N1 TTI's It sends, the value of N1 is determined by current link-quality, if current link transmission is more unobstructed, from distant, the N1 of time-out Value can be larger, conversely, smaller.

As a result of above-mentioned caching mechanism, thus the SN of PDCP PDU is continuous, and no Gap needs to handle, to It can provide in a standard, once being assigned with the data packet of PDCP SN, not allow to be deleted, it is necessary to continue to carry out to opposite end Transmission.

RLC-H layers be mainly responsible for data sequentially submit and ARQ (Automatic Repeat Request, autonomous retransmission are asked Ask) data transmission guarantee.Specifically, the distribution of RLC SN, sends window and judges, if it is AM (affirmation mode), need to consider Whether Polling (poll) bit carries, and ultimately forms RLC PDU.

In general please join it is of course also possible to comprising several PDCP PDU comprising a PDCP PDU in RLC PDU Examine Fig. 6.When RLC PDU and PDCP PDU are corresponded, RLC can be multiplexed PDCP SN.

In the embodiment of the present invention, RLC-H layers can also carry out above-mentioned caching mechanism to data packet, avoid to the allocated The data packet of RLC SN is deleted, and is primarily due to, when having oneself independent RLC SN for RLC-H layers, be equivalent to only RLC SN just do not allow notch occur, and at this moment due to having two layers of SN, i.e. RLC and PDCP respectively there are one SN, then for For PDCP layers, the packet loss of PDCP PDU is not especially sensitive, i.e., PDCP PDU can be dropped, and at this moment PDCP can not delay Deposit data packet is then sent to RLC-H cachings, a large amount of RLC SDU is carried out by RLC-H once receiving data packet after processing Caching, and to a small amount of RLC SDU processing of caching, obtain RLC PDU, it is to be transmitted to be sent to MAC layer etc..

Specifically, in the embodiment of the present invention, following method may be used and avoid data packet to having been allocated for RLC SN It is deleted：

Referring to FIG. 7, the described RLC-H layers PDCP PDU processing to receiving, RLC PDU are obtained, and by RLC PDU is sent to the step of RLC-L layers of network side and includes：

Caching step 71：The described RLC-H layers PDCP PDU processing to receiving, obtains RLC SDU, and by RLC SDU is stored in caching；

Pre-treatment step 72：Described RLC-H layers obtains third quantity RLC SDU from the caching, and to described the Three quantity RLC SDU processing distribute SN including for the third quantity RLC SDU, obtain RLC PDU；

Forwarding step 73：RLC PDU are sent to RLC-L layers by described RLC-H layers；

Supplement step 74：The 4th quantity MAC PDU in the corresponding MAC PDU of the third quantity RLC SDU When being sent, the pre-treatment step 72 is returned.

The effect of supplement step is once the data packet portions for having carried out rlc layer processing are transmitted, then according to advanced The sequence first gone out continues the processing that rlc layer is carried out to the remainder data packet in caching, ensures the data for having carried out rlc layer processing Packet can carry out eating dishes without rice or wine to send enough, not influence transmission rate.

Further include after the caching step 71：

Described RLC-H layers judges whether the RLC SDU being stored in caching are overtime, as the RLC SDU being stored in caching Time-out directly deletes the RLC SDU for being stored in the time-out in caching.

In the embodiment of the present invention, RLC-H layers when receiving PDCP PDU, not at once carry out rlc layer processing, but with The form of RLC SDU is stored in caching, and only the fraction data packet to be stored in caching carries out the processing of rlc layer, For fraction allocation of packets SN, and RLC-L layers being sent to, these data can be soon passed away, then, then according to Sequence is that the processing of rlc layer is carried out to the remainder data packet in caching.It, can be directly by the data packet when a certain data packet time-out It is removed from the cache, since the data packet being stored in caching is not previously allocated SN, thus the deletion of the data packet will not Cause entire SN sequences notch occur, is also no longer needed for the confirmation that additional mechanism carries out receiving-transmitting sides feelings as to this.

Above-mentioned third quantity can determine according to current scheduling information and/or transmission situation, specifically, may be used with Under type determines：

1) third quantity=N2 × GBR, wherein N2 is positive integer；Or

2) third quantity=N2 × PBR, wherein N2 is positive integer；Or

3) third quantity=N2 × M, wherein N2 is positive integer, the actual amount of data of M each TTI scheduling before being.

Above-mentioned calculation can ensure that the third number of data packet for carrying out RLC processing disclosure satisfy that the hair of N2 TTI It send, the value of N2 is determined by current link-quality, distant from time-out if current link transmission is more unobstructed, N2's Value can be larger, conversely, smaller.

As a result of above-mentioned caching mechanism, thus, the SN of RLC PDU is continuous, and no Gap needs to handle, to It can provide in a standard, once being assigned with the data packet of RLC SN, not allow to be deleted, it is necessary to continue to carry out to opposite end Transmission.

When at least two RLC-L layers of an every RLC-H layers of correspondence, the RLC-H layers of path for issuing data has certain Routing mechanism, following several sending methods may be used, which RLC-L RLC PDU are sent to by selection：

(1) carrying separation is sent

So-called carrying separation, which is sent, refers to：RLC-H layers shunt RLC PDU, and the RLC PDU after shunting are distinguished It is sent at least two RLC-L layers.

For example, RLC-H layers of two RLC-L layers of correspondence, the i.e. corresponding logic channels of the RLC-H correspond under two datas Path is sent out, when two paths have equivalent rate, data packet 0,2,4,6,8 ... can be sent to a paths, it will Data packet 1,3,5,7,9 ... is sent to another paths.If two paths rates difference is bigger, two are can be considered The transmission situation and load condition in path carry out shunting transmission, to ensure number in conjunction with the feedback of flow control mechanism to data packet According to opposite end can be communicated to as early as possible.

Carrying separation sending method is mainly characterized by multilink simultaneous transmission, and transmission is different data.

(2) it replicates and sends

So-called duplication is sent：RLC-H layers are replicated RLC PDU, and the RLCPDU after duplication is sent respectively To at least two RLC-L layers.

Sending method is replicated mainly for some important data, or to reliability and the higher number of delay requirement According to after being replicated, being sent simultaneously on two or multilink.

The multilink that is mainly characterized by for replicating sending method is both transmission, and transmission is identical data.

(3) selectivity is sent

So-called selectivity, which is sent, refers to：RLC-H layers select a link from least both links, and RLC PDU are sent out The link for giving selection is RLC-L layers corresponding.

Specifically, described RLC-H layers can according to the link-quality of at least both links, select link-quality it is best one Item is sent.

The most of the time that is mainly characterized by of selective sending method is that a wherein link is selected to transmit.

The RLC-L layers of segmentation cascade for being mainly responsible for data.

Preferably, the described RLC-L layers RLC PDU processing that will be received obtains RLC PDU or RLC PDU segmentations, And the step of being sent to the MAC layer of network side, includes：

Described RLC-L layers is stored in the RLC PDU received in caching；

Specifically, when the transmission opportunity of the MAC layer reaches, the RLC-L layers of resource dispatched according to MAC layer Size carries out cascade and segmentation appropriate to RLC PDU, and is sent to the MAC layer.

MAC layer mainly completes cascade processing and the HARQ operation of scheduling and Different Logic channel.

In the embodiment of the present invention, each MAC layer can correspond to RLC-L layers multiple, and when there is a plurality of logic channel, difference is patrolled The data of volume channel can be multiplexed in MAC layer, i.e. multiple RLC PDU or RLC the PDU segmentations of Different Logic channel can be with It is multiplexed into a MAC PDU.

The above-mentioned data transmission method of the present invention can be applied to a plurality of types of wireless-transmission networks, and citing below carries out Explanation：

1) data transmission method can be applied to the wireless biography of CU-DU (centralized unit-distributed unit) framework Defeated network, at this point, described PDCP layers and described RLC-H layers is located in CU；Described RLC-L layers is located at MAC layer in DU；

2) data transmission method can be applied to the wireless-transmission network of NR dual links or multi-connection framework, described PDCP layers and described RLC-H layers are located in MeNB；

3) data transmission method can be applied to NR (New Radio, new wireless)-LTE interworking frameworks Wireless-transmission network, described PDCP layers and described RLC-H layer are in NR MeNB.

That is, the data transmission method of the embodiment of the present invention can be equal in 5G internal systems and cross-system content It can implement.

The UE side apparatus frameworks involved by the embodiment of the present invention are illustrated below.

UE side apparatus includes PDCP layers, rlc layer and MAC layer, wherein at least one rlc layer of an every PDCP layers of correspondence, it is each Rlc layer corresponds to multiple MAC layers.

Embodiment two

Referring to FIG. 8, the embodiment of the present invention two provides a kind of data transmission method, which is applied to UE The downlink reception of side, the data transmission method include：

Step 81：MAC PDU processing of the MAC layer of the sides UE to receiving obtains RLC PDU or RLC PDU segmentations, And it is sent to corresponding rlc layer, wherein each rlc layer corresponds to multiple MAC layers；

In the embodiment of the present invention, the MAC layer does not simultaneously differentiate between RLC PDU or RLC PDU segmentations, does identical processing, Also, the MAC layer can be by obtaining the logic channel ID in RLC PDU or RLC PDU segmentations, according to RLC PDU or RLC Logic channel ID in PDU segmentations determines the rlc layer belonging to RLC PDU or RLC PDU segmentations.

Step 82：The rlc layer integrates RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent Processing, obtains complete RLC PDU, and PDCP PDU are obtained from complete RLC PDU, and PDCP PDU is sent to described The PDCP layers of the sides UE, wherein each rlc layer corresponds to a PDCP layers, at least one rlc layer of an every PDCP layers of correspondence；

Specifically, when receiving RLC PDU segmentations, it is ranked up according to the SN of segmentation, and formed according to segment information Complete RLC PDU.

When PDCP PDU are sent to PDCP layers, even if PDCP PDU are non-received in-orders, can still send.

Step 83：Described PDCP layers, to receiving PDCP PDU processing, obtains PDCP SDU, and be forwarded to the UE The high level of side.

Specifically, PDCP layers are decrypted the PDCP PDU received, solve head compression and processing of reordering, to sequentially Data packet is submitted to high level after therefrom solving PDCP SDU.

In the embodiment of the present invention, since each rlc layer corresponds to multiple MAC layers, rlc layer can come from the number on mulitpath According to integrated treatment, such as reception sequence, recombination and feedback of status is carried out, network efficiency is improved.

Preferably, the step of rlc layer carries out integrated treatment to the RLC PDU or RLC PDU segmentation received include： The rlc layer is ranked up RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent, and is sentenced according to ranking results It is disconnected to whether there is packet loss, when there are packet loss, packet loss state report is sent to the RLC-H layers of network side.

One-to-one relationship when the RLC-H layers of the rlc layers of the sides UE and network side, corresponds to the same logic channel, place Manage ARQ (automatic repeat request) correlation function.

After the sides UE receive the re-transmission packet of network side transmission, then confirmation message (ACK) can be returned to as needed, once Successfully feedback and retransmission processes terminate.

In the embodiment of the present invention, the reception condition on rlc layer combination multilink is common to generate feedback and packet loss state report It accuses, to improve network efficiency.

Embodiment three

Referring to FIG. 9, the embodiment of the present invention three provides a kind of data transmission method, which is applied to net The downlink of network side retransmits, and the data transmission method includes：

Step 91：When the packet loss state report of the RLC-H layers of rlc layer feedback for receiving the sides UE, the packet loss state is determined RLC PDU or RLC the PDU segmentations that the needs specified in report retransmit；Obtain PDU points of RLC PDU or RLC for needing to retransmit Section, and it is sent to RLC-L layers；

Step 92：Described RLC-L layers is sent to RLC PDU or RLC the PDU segmentations that the needs received retransmit MAC layer；

Step 93：The MAC layer handles RLC PDU or RLC the PDU segmentations that the needs received retransmit, MAC PDU are obtained, and are sent to the sides UE.

In the embodiment of the present invention, when need to retransmit is RLC PDU segmentations, PDU points of specified RLC can be only transmitted Section, RLC-H layer include according to packet loss state in the segment information of re-transmission packet specified, form corresponding RLC PDU and be segmented.

In the embodiment of the present invention, it is preferable that described to need in the RLC PDU or RLC PDU retransmitted segmentations and/or RLC-H Layer includes being used to indicate current RLC PDU or RLC PDU to be segmented into the label that re-transmission is wrapped with RLC-L layer of interface message.

For example, on the head of RLC PDU, there are one the domains of 1bit, can be expressed as by setting to 0 the domain of the 1bit It just passes, sets 1 and be expressed as retransmitting, vice versa.Alternatively, packet can be retransmitted in RLC-H layers and carrying in RLC-L layers of interface message Label, such as GTP-U head show carry, can also be 1bit, a value represents initial transmission packet, another value represent weigh Pass packet.

Because the general packet that retransmits has higher priority, can first be sent with initial transmission packet, thus, the present invention is implemented In example, when an every RLC-H layers of correspondence is RLC-L layers multiple, it is preferable that in the step 91, RLC-H layers obtain what needs retransmitted RLC PDU or RLC PDU segmentations, and the step of being sent to RLC-L layers includes：Described RLC-H layers is selected from least both links It selects a link circuit condition and is better than the link of other links, and the link that RLC PDU are sent to selection is RLC-L layers corresponding.That is, When re-transmission, according to the real-time condition of current multilink, the path for selecting link circuit condition best is transmitted, it is not intended that just passing Path selection, in the embodiment of the present invention, just pass and retransmit Path selection and be independent from each other process.

When re-transmission packet reaches RLC-L layers, due to that with higher priority, then can be having the preferentially transmitted.That is, above-mentioned step In rapid 92, RLC PDU or RLC the PDU segmentations that the needs received retransmit are sent to corresponding institute by described RLC-L layers The step of MAC layer for stating network side includes：Described RLC-L layers is receiving PDU points of the RLC PDU or RLC that the needs retransmit RLC PDU or RLC the PDU segmentations for needing to retransmit preferentially are sent to the MAC layer by Duan Shi.The RLC-L layers of basis The marker recognition for retransmitting packet retransmits packet.

In the embodiment of the present invention, when a RLC-H layers corresponding multiple RLC-L layers, RLC-H layers can will be on multilink It transmits situation and carries out integrated treatment, re-transmission is effectively performed, the experience of user can be promoted, is also beneficial to carrying for network efficiency It rises.

1) data transmission method can be applied to the wireless-transmission network of CU-DU frameworks, at this point, described PDCP layers and Described RLC-H layers is located in CU；Described RLC-L layers is located at MAC layer in DU；

3) data transmission method can be applied to the wireless-transmission network of NR-LTE interworking frameworks, institute PDCP layers and described RLC-H layers are stated to be located in NR MeNB.

Example IV

Referring to FIG. 10, the embodiment of the present invention four provides a kind of data transmission method, which is applied to The uplink of the sides UE just passes transmission, and the data transmission method includes：

Step 101：The PDCP layers of the sides UE handle the high level data packet received, obtain PDCP PDU, and send To the rlc layer of the sides UE, wherein at least one rlc layer of an every PDCP layers of correspondence；

Step 102：PDCP PDU processing of the rlc layer to receiving obtains RLC PDU or RLC PDU segmentations, And RLC PDU or RLC PDU segmentations are sent to the MAC layer of the sides UE, wherein each rlc layer corresponds at least two MAC layers；

Specifically, rlc layer completes the processing of RLC PDU, it, will after can shifting to an earlier date or MAC layers transfer resource being waited to obtain Corresponding RLC PDU or RLC PDU segmentations are sent to MAC layer and are sent.

Step 103：The MAC layer handles RLC PDU or RLC the PDU segmentations received, obtains MAC PDU, And it is sent to network side.

In the embodiment of the present invention, since each rlc layer corresponds at least two MAC layers, at least both links are also just corresponded to, from And rlc layer can select the preferable path transmission data of link according to the real-time condition of current ink, to improve network effect Rate.

That is, the rlc layer may include the step of RLC PDU or RLC PDU segmentations are sent to the MAC layer of the sides UE：Institute State the link that rlc layer selects at least one link circuit condition to be better than other links from least both links, and by RLC PDU or RLC PDU segmentations are sent to the corresponding MAC layer of link of selection.

Embodiment five

1 is please referred to Fig.1, the embodiment of the present invention five provides a kind of data transmission method, which is applied to The uplink receiving of network side, the data transmission method include：

Step 111：MAC PDU processing of the MAC layer of network side to receiving obtains PDU points of RLC PDU or RLC Section, and be sent to RLC-L layers corresponding, wherein each MAC layer corresponds to RLC-L layers at least one, an every RLC-L layers of correspondence one A MAC layer；

Specifically, the MAC layer can obtain the logic channel ID in RLC PDU or RLC PDU segmentations, according to RLC Logic channel ID in PDU or RLC PDU segmentations determines the RLC-L layers belonging to RLC PDU or RLC PDU segmentations.

Step 112：Described RLC-L layers the RLC PDU or RLC PDU received segmentations are passed through it is RLC-H layers corresponding, Wherein, an every RLC-H layers of correspondence is RLC-L layers at least one；

Step 113：Described RLC-H layers handles RLC PDU or RLC the PDU segmentations received, obtains complete RLC PDU, and PDCP PDU are obtained from complete RLC PDU, and PDCP PDU are sent to the PDCP layers of the network side, Wherein, each rlc layer corresponds to a PDCP layers, and an every PDCP layers of correspondence is RLC-H layers at least one；

Step 114：Described PDCP layers, to receiving PDCP PDU processing, obtains PDCP SDU, and be forwarded to described The high level of network side.

In the embodiment of the present invention, it is preferable that an every RLC-H layers of at least two RLC-L layers of correspondence, the RLC-H layers of docking Receiving the step of RLC PDU or RLC PDU segmentations are handled, obtain complete RLC PDU includes：The RLC-H layers of docking RLC PDU or RLC the PDU segmentations for receiving different RLC-L layers of transmissions carry out integrated treatment, obtain complete RLC PDU.

Preferably, RLC PDU or RLC the PDU segmentations of the described RLC-H layers different RLC-L layers of transmission to receiving carry out The step of integrated treatment includes：Described RLC-H layers RLC PDU or RLC the PDU segmentation to the different RLC-L layers of transmission received It is ranked up, packet loss is judged whether according to ranking results, when there are packet loss, packet loss state is sent to the rlc layer of the sides UE Report.

That is, the RLC-H layers of reception state by different paths is uniformly processed, feedback is formed, packet loss state report is sent to The rlc layer of the sides UE, to improve network efficiency.

It can only include NACK states specifically, in packet loss state report, can also include ACK states simultaneously.

The described RLC-H layers sequence number according to RLC PDU or RLC the PDU segmentations received, to the RLC PDU received Or RLC PDU segmentations are ranked up, and judge whether RLC PDU or RLC the PDU segmentations of sequence number missing；

The data transmission method of the embodiment of the present invention can be applied to a plurality of types of wireless-transmission networks, for example：

2) data transmission method can be applied to the wireless-transmission network of NR dual links or multi-connection framework, at this point, Described PDCP layers and described RLC-H layers is located in MeNB；Or

3) data transmission method can be applied to the wireless-transmission network of NR-LTE interworking frameworks, this When, described PDCP layers and described RLC-H layers is located in NR MeNB.

Embodiment six

2 are please referred to Fig.1, the embodiment of the present invention six provides a kind of data transmission method, which is applied to The uplink retransmission of the sides UE, the data transmission method include：

Step 121：When the rlc layer of the sides UE receives the packet loss state report of RLC-H layers feedback of network side, described in determination RLC PDU or RLC the PDU segmentations that the needs specified in packet loss state report retransmit；Obtain the RLC PDU or RLC for needing to retransmit PDU is segmented, and is sent to MAC layer；

Step 122：At RLC PDU or RLC the PDU segmentations that the MAC layer retransmits the needs received Reason, obtains MAC PDU, and be sent to network side.

Since each rlc layer corresponds to multiple MAC layers, thus, rlc layer can include to the packet loss state on mulitpath into Row integrated treatment, to improve network efficiency.

Preferably, the rlc layer obtains RLC PDU or RLC the PDU segmentations for needing to retransmit, and is sent to the step of MAC layer Suddenly include：The rlc layer obtains the link of nearest ascending resource, and will need RLC PDU or RLC the PDU segmentation hairs retransmitted The corresponding MAC layer of link for giving the nearest ascending resource, to ensure retransmission delay time.

Uplink needs are dispatched, and have certain time delay, for example, take ascending resource in moment t, one As be i.e. t+4 uses after 4 subframes.If on two paths, as soon as ascending resource is had been obtained for, after 4 subframes It can use, another there are no resources, then the first paths to have nearest ascending resource.If on two paths, first It can be used after 2 subframes of ascending resource, it can be with (it is all after receiving ascending resource to refer to two after the second subframe of paths 3 Have been waiting for different durations), it is evident that still the first paths have nearest ascending resource.

Certainly, in some other embodiment of the present invention, it is also an option that the higher path of reliability, such as averagely accidentally Block rate is lower or the better path of link-quality, transmission need RLC PDU or RLC the PDU segmentations retransmitted.

Embodiment seven

The structural schematic diagram of the wireless-transmission network for the CU-DU frameworks that 3, Figure 13 is the embodiment of the present invention seven is please referred to Fig.1, It can be observed from fig. 13 that in network side, PDCP layers and RLC-H layers are located in CU, and RLC-L layers are located at MAC layer in DU, this hair In bright embodiment, one RLC-H layers of a PDCP layers of correspondence, two RLC-L layers of a RLC-H layers of correspondence, i.e., one RLC-H layers Corresponding two leg (leg1 and leg2), one MAC layer of an every RLC-L layers of correspondence.In the sides UE, one RLC of a PDCP layers of correspondence Layer, a rlc layer correspond to 2 MAC layers (MAC-1 and MAC-2).

It transmission, downlink is just passed to the downlink of the wireless-transmission network of the CU-DU frameworks in Figure 13 below just passes and receive and anti- Feedback, downlink retransmit, uplink just passes transmission, just biography receives uplink and feedback, the process of uplink retransmission are described in detail.

(1) uplink just passes transmission

It mainly includes the following steps that：

Step 1311：The PDCP layers of CU entities handle the high level data packet received, obtain PDCP PDU (Protocol Data Unit, protocol Data Unit), and it is sent to RLC-H layers；

Specifically, PDCP layers may be used above-mentioned caching mechanism, when receiving high level data packet, PDCP SDU will be obtained It is stored in caching, and the primary processing for only carrying out PDCP layers to a small amount of PDCP SDU in caching, it is concurrent to obtain PDCP PDU RLC-H layers are given, PDCP layers of processing directly can also be carried out to it, and be sent to RLC-H when receiving high level data packet Layer.

In the embodiment of the present invention, rlc layer and PDCP layers of one-to-one correspondence belong to the same logic channel, and in CU, each Logic channel only corresponds to a rlc layer, and the rlc layer is due to positioned at the upper end of protocol stack, also referred to as RLC-High (RLC- H) layer；

Step 1312：The described RLC-H layers PDCP PDU processing to receiving, obtains RLC PDU, and by RLC PDU is sent to the RLC-L layers of DU entities by leg1；

Specifically, RLC-H can also use above-mentioned caching mechanism that will obtain RLC SDU when receiving PDCP PDU and deposit It is stored in caching, and the primary processing for only carrying out rlc layer to a small amount of RLC SDU in caching, obtains RLC PDU and be sent to DU The RLC-L layers of entity.

Step 1313：The RLC PDU received are stored in caching by the RLC-L layers of DU entities；When the biography of the MAC layer When defeated opportunity reaches, the described RLC-L layers RLC PDU processing by caching obtains RLC PDU or RLC PDU segmentations, concurrently Give the MAC layer.

Step 1314：The MAC layer handles RLC PDU or RLC the PDU segmentations received, obtains MAC PDU, And it is sent to the sides UE.

(2) downlink, which just passes, receives and feeds back

Step 1321：MAC PDU processing of the MAC layer of the sides UE to receiving obtains PDU points of RLC PDU or RLC Section, and it is sent to corresponding rlc layer；

Step 1322：The sequence number that the rlc layer is segmented according to RLC PDU or the RLC PDU received, to what is received RLC PDU or RLC PDU segmentations are ranked up, and obtain complete RLC PDU, and obtain PDCP from complete RLC PDU PDU, and PDCP PDU are sent to the PDCP layers of the sides UE.And in sequencer procedure, judge whether that sequence number lacks RLC PDU or RLC the PDU segmentations of mistake；When RLC PDU or RLC the PDU segmentations lacked there are sequence number, startup is reordered Timer；When the timer expiry that reorders, when not receiving RLC PDU or RLC the PDU segmentations of the sequence number missing yet, sentence Surely there is packet loss.When there are packet loss, packet loss state report is sent to the RLC-H layers of network side.

Step 1323：Described PDCP layers, to receiving PDCP PDU processing, obtains PDCP SDU, and be forwarded to described The high level of the sides UE.

(3) downlink retransmits

Step 1331：The RLC-H layers of the CU entities of network side receive the packet loss state report of the rlc layer feedback of the sides UE When, determine RLC PDU or RLC the PDU segmentations that the needs specified in the packet loss state report retransmit；Obtain what needs retransmitted RLC PDU or RLC PDU segmentations, and one link circuit condition of selection is better than the link (leg2) of other links from both links, And the link that RLC PDU are sent to selection is RLC-L layers corresponding；

Step 1332：Described RLC-L layers receive it is described need the RLC PDU or RLC PDU retransmitted segmentations when, preferentially RLC PDU or RLC the PDU segmentations for needing to retransmit are sent to the MAC layer.

Step 1333：At RLC PDU or RLC the PDU segmentations that the MAC layer retransmits the needs received Reason, obtains MAC PDU, and be sent to the sides UE.

(4) uplink just passes transmission

Step 1341：The PDCP layers of the sides UE handle the high level data packet received, obtain PDCP PDU, and send To the rlc layer of the sides UE；

Step 1342：PDCP PDU processing of the rlc layer to receiving obtains PDU points of RLC PDU or RLC Section, and RLC PDU or RLC PDU are segmented to the MAC layer for being sent to the sides UE；

Step 1343：The MAC layer handles RLC PDU or RLC the PDU segmentations received, obtains MAC PDU, And it is sent to network side.

(5) uplink receiving and feedback

Step 1351：MAC PDU processing of the MAC layer of network side to receiving, obtains RLC PDU or RLC PDU Segmentation, and be sent to RLC-L layers corresponding；

Step 1352：RLC PDU or RLC the PDU segmentations received are passed through corresponding RLC-H by described RLC-L layers Layer；

Step 1353：The RLC-H layers of CU entities are to receiving different RLC-L layers RLC PDU or the RLC PDU sent Segmentation carries out integrated treatment, obtains complete RLC PDU, and PDCP PDU are obtained from complete RLC PDU, and by PDCP PDU is sent to the PDCP layers of the network side；Also, in sequencer procedure, packet loss is judged whether according to ranking results, when There are when packet loss, packet loss state report is sent to the rlc layer of the sides UE.

Step 1354：Described PDCP layers, to receiving PDCP PDU processing, obtains PDCP SDU, and be forwarded to described The high level of network side.

(6) uplink retransmission

Step 1361：When the rlc layer of the sides UE receives the packet loss state report of RLC-H layers feedback of network side, institute is determined State RLC PDU or RLC the PDU segmentations that the needs specified in packet loss state report retransmit；Obtain need the RLC PDU that retransmit or RLC PDU segmentations, and the link of nearest ascending resource is obtained, and RLC PDU or RLC the PDU segmentations for needing to retransmit are sent To the corresponding MAC layer of link of the nearest ascending resource.

Step 1362：At RLC PDU or RLC the PDU segmentations that the MAC layer retransmits the needs received Reason, obtains MAC PDU, and be sent to network side.

Embodiment eight

Please refer to Fig.1 the wireless-transmission network of NR dual links or multi-connection framework that 4, Figure 14 is the embodiment of the present invention eight Structural schematic diagram, as can be seen from Figure 14, in the embodiment of the present invention, in network side, PDCP layers and RLC-H layers are located at MeNB In, further include one RLC-L layers and a MAC layer in MeNB, also include one RLC-L layer and a MAC layer in SeMB, In, one RLC-H layers of a PDCP layers of correspondence, two RLC-L layers of a RLC-H layers of correspondence, i.e. a RLC-H layers of correspondence two Leg, one MAC layer of an every RLC-L layers of correspondence.In the sides UE, one rlc layer of a PDCP layers of correspondence a, rlc layer corresponds to 2 MAC layer (MAC-1 and MAC-2).

Between NR substrates (MeNB and SeNB), the transmission of dual link or multi-connection can be carried out, in the embodiment of the present invention, The example for only giving dual link is then considered as multi-connection if there is two or more SeNB.

In the framework of the embodiment of the present invention, for network side, the routing node of dual link or multi-connection is RLC- H。

Data processing in the embodiment of the present invention is similar with the data handling procedure in previous embodiment, and maximum difference exists In the PDCP and RLC-H of network side it is located therein inside a transmission paths MeNB, PDCP understands the state of the MeNB Most clear and conveniently, other flows are similar, are not described in detail herein.

Embodiment nine

Please refer to Fig.1 the wireless transmission net for the NR-LTE interworking frameworks that 5, Figure 15 is the embodiment of the present invention nine The structure chart of network, as can be seen from Figure 15, in the embodiment of the present invention, in network side, PDCP layers and RLC-H layers are located at MeNB In, further include one RLC-L layers and a MAC layer in MeNB, also include one RLC-L layer and a MAC layer in LTE SeMB, Wherein, one RLC-H layers of PDCP layers of correspondence, two RLC-L layers of a RLC-H layers of correspondence, i.e. a RLC-H layers of correspondence two Leg, one MAC layer of an every RLC-L layers of correspondence.In the sides UE, one rlc layer of a PDCP layers of correspondence a, rlc layer corresponds to 2 A MAC layer (MAC-1 and MAC-2).

In the case where 5G systems and 4G cooperative systems work, as shown in figure 15, the left side is NR protocol stacks, and the right is LTE Protocol stack, it is LTE protocol stack clearly to write out in Figure 15, then uses LTE existing protocols to handle, other protocol stacks are required to Take the new protocol stacks of NR.

Be merely given as a kind of example in certain Figure 15, can also LTE links have two or more, that is, increase new LTE SeNB, the similar addition of structure equally in the sides NR, can also add new SeNB, i.e., new NR SeNB, constitute multi-connection.

In the interworking the case where, more special is that the link of LTE needs to keep existing processing procedure.It is right For network side, LTE links completely can be handled the data packet received as RLC SDU, not have to distinguish specific Data format, existing LTE protocol can ensure that this point or even LTE links can be configured to UM patterns, need not be to data Confirmed and is retransmitted, and all feedbacks and re-transmission are carried out by 5G RLC-H.

As shown in figure 15, the sides UE RLC is ranked up and recombinates to the RLC data from mulitpath, and what be will be seen that loses Packet feeds back to RLC-H layer of network side, the re-transmission of RLC-H arrangement layer corresponding datas, and most fast path can also be selected by retransmitting, can be with Pass through the paths LTE.The paths LTE do not differentiate between type of data packet, are handled fully according to reception sequence, and counterweight may be cannot achieve The high priority processing of packet is passed, certainly, if retransmitting the mark for being carried in packet and retransmitting packet, the paths LET can also carry out high preferential The processing of grade.For the paths NR, the priority processing to retransmitting data is supported.

Embodiment ten

Please refer to Fig.1 the structural schematic diagram for the network side equipment that 6, Figure 16 is the embodiment of the present invention ten, the network side equipment Including：

Preferably, include for described RLC-H layers：

Preferably, include for described PDCP layers：

First sending module, for PDCP PDU to be sent to RLC-H layers；

Preferably, first quantity determines in the following ways：

First quantity=N1 × GBR, wherein N1 is positive integer；Or

First quantity=N1 × PBR, wherein N1 is positive integer；Or

Preferably, include for described RLC-H layers：

Second sending module, for RLC PDU to be sent to RLC-L layers；

Preferably, the third quantity determines in the following ways：

Third quantity=N2 × GBR, wherein N2 is positive integer；Or

Third quantity=N2 × PBR, wherein N2 is positive integer；Or

Preferably, include for described RLC-L layers：

Cache module, the RLC PDU for will receive are stored in caching；

Embodiment 11

Please refer to Fig.1 the structural schematic diagram for the user equipment that 7, Figure 17 is the embodiment of the present invention 11, the user equipment packet It includes：

MAC layer obtains RLC PDU or RLC PDU segmentations, and be sent to for the MAC PDU processing to receiving Corresponding rlc layer, wherein each rlc layer corresponds to multiple MAC layers；

Rlc layer, RLC PDU or RLC the PDU segmentations for being sent to the different MAC layers received carry out integrated treatment, Complete RLC PDU are obtained, and obtain PDCP PDU from complete RLC PDU, and PDCP PDU are sent to PDCP layers, In, each rlc layer corresponds to a PDCP layers, at least one rlc layer of an every PDCP layers of correspondence；

Embodiment 12

The user equipment of the embodiment of the present invention includes：

Embodiment 13

The network side equipment of the embodiment of the present invention includes：

The operation principle of device of the present invention can refer to the description of preceding method embodiment.

Embodiment 14

The embodiment of the present invention 14 provides a kind of data processing equipment, including：Processor；And by bus interface with The memory that the processor is connected, the memory is for storing the processor used program when executing operation And data, when processor calls and executes the program and data that are stored in the memory, including realize following function Module or unit：

RLC-L layers, the RLC PDU processing for will receive obtains RLC PDU or RLCPDU segmentations, and sends To MAC layer, wherein one MAC layer of an every RLC-L layers of correspondence, each MAC layer corresponds to RLC-L layers at least one；

Embodiment 15

The embodiment of the present invention 15 provides a kind of data processing equipment, including：Processor；And by bus interface with The memory that the processor is connected, the memory is for storing the processor used program when executing operation And data, when processor calls and executes the program and data that are stored in the memory, including realize following function Module or unit：

Embodiment 16

The embodiment of the present invention 16 provides a kind of data processing equipment, including：Processor；And by bus interface with The memory that the processor is connected, the memory is for storing the processor used program when executing operation And data, when processor calls and executes the program and data that are stored in the memory, including realize following function Module or unit：

Rlc layer obtains RLC PDU or RLC PDU segmentations for the PDCP PDU processing to receiving, and by RLC PDU or RLC PDU segmentations are sent to MAC layer, wherein at least two MAC layers of an every RLC layers of correspondence；

Embodiment 17

The embodiment of the present invention 17 provides a kind of data processing equipment, including：Processor；And by bus interface with The memory that the processor is connected, the memory is for storing the processor used program when executing operation And data, when processor calls and executes the program and data that are stored in the memory, including realize following function Module or unit：

It should be noted that the device that the 14th, 15,16 and 17 embodiments of the invention provide is can to correspond to reality The device for the data transmission method that existing above method embodiment provides, therefore the data transmission method of above method embodiment offer All embodiments can be to should apply to the embodiment of the 14th, 15,16 and 17, and can reach same or analogous Advantageous effect.

In several embodiments provided herein, it should be understood that disclosed method and apparatus, it can be by other Mode realize.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only For a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine Or it is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed phase Coupling, direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit Connection can be electrical, machinery or other forms.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also It is that the independent physics of each unit includes, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list The form that hardware had both may be used in member is realized, can also be realized in the form of hardware adds SFU software functional unit.

The above-mentioned integrated unit being realized in the form of SFU software functional unit can be stored in one and computer-readable deposit In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) executes receiving/transmission method described in each embodiment of the present invention Part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, abbreviation ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store The medium of program code.

The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims

1. a kind of data transmission method is applied to network side, which is characterized in that including：

PDCP layers of Packet Data Convergence Protocol handles the high level data packet received, obtains PDCP PDU, and be sent to RLC-H layers, wherein an every PDCP layers of correspondence is RLC-H layers at least one；

The described RLC-H layers PDCP PDU processing to receiving obtains RLC PDU, and RLC PDU is sent to RLC-L Layer, wherein an every RLC-H layers of correspondence is RLC-L layers at least one；

The described RLC-L layers RLC PDU processing that will be received obtains RLC PDU or RLC PDU segmentations, and is sent to MAC Layer, wherein one MAC layer of an every RLC-L layers of correspondence, each MAC layer corresponds to RLC-L layers at least one；

2. data transmission method according to claim 1, which is characterized in that at least two RLC-L of an every RLC-H layers of correspondence Layer.

3. data transmission method according to claim 2, which is characterized in that described RLC-H layers is sent to RLC PDU RLC-L layers of the step of include：

Described RLC-H layers shunts RLC PDU, and the RLC PDU after shunting are sent respectively at least two RLC-L Layer；Or

Described RLC-H layers is replicated RLC PDU, and the RLC PDU after duplication are sent respectively at least two RLC-L Layer；Or

Described RLC-H layers selects a link from least both links, and the link that RLC PDU are sent to selection is corresponding RLC-L layers.

4. data transmission method according to claim 1, which is characterized in that the PDCP layers of high level data to receiving Packet is handled, and obtains PDCP PDU, and the step of being sent to RLC-H layers includes：

Caching step：Described PDCP layers handles the high level data packet received, obtains PDCP SDU, and by PDCP SDU It is stored in caching；

Pre-treatment step：Described PDCP layers obtains the first quantity PDCP SDU from the caching, to first quantity PDCP SDU processing, wherein including distributing SN for the first quantity PDCP SDU, obtain PDCP PDU；

Forwarding step：PDCP PDU are sent to RLC-H layers by described PDCP layers；

Supplement step：When the second quantity MAC PDU in the corresponding MAC PDU of the first quantity PDCP SDU are sent When, return to the pre-treatment step.

5. data transmission method according to claim 4, which is characterized in that first quantity is true in the following ways It is fixed：

First quantity=N1 × GBR, wherein N1 is positive integer；Or

First quantity=N1 × PBR, wherein N1 is positive integer；Or

6. data transmission method according to claim 1, which is characterized in that the RLC-H layers of PDCP to receiving PDU processing obtains RLC PDU, and the step of RLC PDU are sent to RLC-L layers includes：

Caching step：The described RLC-H layers PDCP PDU processing to receiving obtains RLC SDU, and RLC SDU is deposited It is stored in caching；

Pre-treatment step：Described RLC-H layers obtains third quantity RLC SDU from the caching, and to the third quantity A RLC SDU processing distributes SN including for the third quantity RLC SDU, obtains RLC PDU；

Forwarding step：RLC PDU are sent to RLC-L layers by described RLC-H layers；

Supplement step：When the 4th quantity MAC PDU in the corresponding MAC PDU of the third quantity RLC SDU are sent When, return to the pre-treatment step.

7. data transmission method according to claim 6, which is characterized in that the third quantity is true in the following ways It is fixed：

Third quantity=N2 × GBR, wherein N2 is positive integer；Or

Third quantity=N2 × PBR, wherein N2 is positive integer；Or

8. data transmission method according to claim 1, which is characterized in that the described RLC-L layers RLC PDU that will be received It is handled, obtains RLC PDU or RLC PDU segmentations, and the step of being sent to MAC layer includes：

Described RLC-L layers is stored in the RLC PDU received in caching；

9. data transmission method according to claim 1, which is characterized in that further include：

When the packet loss state report of the described RLC-H layers rlc layer feedback for receiving the sides UE, the packet loss state report middle finger is determined RLC PDU or RLC the PDU segmentations that fixed needs retransmit；RLC PDU or RLC the PDU segmentations for needing to retransmit are obtained, and are sent To RLC-L layers；

10. data transmission method according to claim 9, which is characterized in that the RLC PDU or RLC for needing to retransmit In PDU segmentations and/or RLC-H layer with RLC-L layers of interface message include being used to indicate current RLC PDU or RLC PDU divide The label that section is wrapped for re-transmission.

11. data transmission method according to claim 10, which is characterized in that an every RLC-H layers of correspondence at least two It is RLC-L layers, described to obtain RLC PDU or RLC the PDU segmentations for needing to retransmit, and the step of being sent to RLC-L layers includes：

The described RLC-H layers link for selecting link circuit condition to be better than other links from least both links, and by RLC PDU The link for being sent to selection is RLC-L layers corresponding.

12. data transmission method according to claim 10, which is characterized in that described RLC-L layers will receive described in The step of RLC PDU or RLC the PDU segmentations for needing to retransmit are sent to the MAC layer of the corresponding network side include：

Described RLC-L layers, when receiving RLC PDU or RLC the PDU segmentations that the needs retransmit, preferentially needs weight by described RLC PDU or RLC the PDU segmentations of biography are sent to the MAC layer.

13. according to claim 1-12 any one of them data transmission methods, which is characterized in that

The data transmission method is applied to the wireless-transmission network of CU-DU frameworks, and described PDCP layers and described RLC-H layers is located at In CU；Described RLC-L layers is located at MAC layer in DU；Or

The data transmission method is applied to the wireless-transmission network of NR dual links or multi-connection framework, described PDCP layer with it is described RLC-H layers are located in MeNB；Or

The data transmission method be applied to NR-LTE interworking frameworks wireless-transmission network, described PDCP layer with Described RLC-H layers is located in NR MeNB.

14. a kind of data transmission method is applied to the sides UE, which is characterized in that including：

MAC PDU processing of the MAC layer to receiving obtains RLC PDU or RLC PDU segmentations, and is sent to corresponding RLC Layer, wherein each rlc layer corresponds to multiple MAC layers；

The rlc layer carries out integrated treatment to RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent, and has obtained Whole RLC PDU, and PDCP PDU are obtained from complete RLC PDU, and PDCP PDU are sent to PDCP layers, wherein it is every One rlc layer corresponds to a PDCP layers, at least one rlc layer of an every PDCP layers of correspondence；

15. data transmission method according to claim 14, which is characterized in that the rlc layer is to the different MAC that receive RLC PDU or the RLC PDU that layer is sent are segmented the step of carrying out integrated treatment：

The rlc layer is ranked up RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent, and is tied according to sequence Fruit judges whether packet loss, and when there are packet loss, packet loss state report is sent to the RLC-H layers of network side.

16. data transmission method according to claim 15, which is characterized in that the rlc layer is to the different MAC that receive RLC PDU or the RLC PDU that layer is sent are segmented the step of being ranked up, packet loss is judged whether according to ranking results：

The sequence number that the rlc layer is segmented according to RLC PDU or the RLC PDU received, to the RLC PDU or RLC received PDU segmentations are ranked up, and judge whether RLC PDU or RLC the PDU segmentations of sequence number missing；

When the timer expiry that reorders, when not receiving RLC PDU or RLC the PDU segmentations of the sequence number missing yet, judgement There are packet losses.

17. a kind of data transmission method is applied to the sides UE, which is characterized in that including：

PDCP layers handle the high level data packet received, obtain PDCP PDU, and be sent to rlc layer, wherein each PDCP layers of at least one rlc layer of correspondence；

18. data transmission method according to claim 17, which is characterized in that further include：

When the rlc layer receives the packet loss state report of RLC-H layers feedback of network side, determine in the packet loss state report RLC PDU or RLC the PDU segmentations that specified needs retransmit；RLC PDU or RLC the PDU segmentations for needing to retransmit are obtained, concurrently It is sent to MAC layer；

19. data transmission method according to claim 18, which is characterized in that described to obtain the RLC PDU for needing to retransmit Or RLC PDU segmentations, and the step of being sent to MAC layer includes：

The rlc layer obtains the link of nearest ascending resource, and RLC PDU or RLC the PDU segmentations for needing to retransmit are sent To the corresponding MAC layer of link of the nearest ascending resource.

20. a kind of data transmission method is applied to network side, which is characterized in that including：

MAC PDU processing of the MAC layer to receiving obtains RLC PDU or RLC PDU segmentations, and is sent to corresponding RLC-L layers, wherein each MAC layer corresponds to RLC-L layers at least one, one MAC layer of an every RLC-L layers of correspondence；

RLC PDU or RLC the PDU segmentations received are passed through RLC-H layers by described RLC-L layers, wherein every a RLC-H layers right It answers RLC-L layers at least one；

Described RLC-H layers is handled receiving RLC PDU or RLC PDU segmentation, obtains complete RLC PDU, and from complete PDCP PDU are obtained in whole RLC PDU, and PDCP PDU are sent to PDCP layers, wherein one PDCP of an every RLC-H layers of correspondence Layer, an every PDCP layers of correspondence are RLC-H layers at least one；

21. data transmission method according to claim 20, which is characterized in that an every RLC-H layers of correspondence at least two RLC-L layers, described RLC-H layers is handled receiving RLC PDU or RLC PDU segmentations, obtains the step of complete RLC PDU Suddenly include：

Described RLC-H layers carries out integrated treatment to RLC PDU or RLC the PDU segmentations for receiving different RLC-L layers of transmissions, obtains Complete RLC PDU.

22. data transmission method according to claim 21, which is characterized in that the RLC-H layers of RLC to receiving PDU or RLC PDU include the step of segmentation is handled：

RLC PDU or RLC the PDU segmentations of the described RLC-H layers different RLC-L layers of transmission to receiving are ranked up, according to row Sequence result judges whether packet loss, and when there are packet loss, packet loss state report is sent to the rlc layer of the sides UE.

23. data transmission method according to claim 22, which is characterized in that the RLC-H layers of difference to receiving The step of RLC PDU or RLC the PDU segmentations of RLC-L layers of transmission are ranked up, packet loss are judged whether according to ranking results Including：

The described RLC-H layers sequence number according to the RLC PDU or RLC PDU segmentation received, to the RLC PDU that receive or RLC PDU segmentations are ranked up, and judge whether RLCPDU the or RLC PDU segmentations of sequence number missing；

When the timer expiry that reorders, when not receiving RLC PDU or the RLCPDU segmentations of the sequence number missing yet, judgement is deposited In packet loss.

24. according to claim 20-23 any one of them data transmission methods, which is characterized in that

25. a kind of network side equipment, which is characterized in that including：

PDCP layers, for handling the high level data packet received, PDCP PDU are obtained, and be sent to RLC-H layers, In, an every PDCP layers of correspondence is RLC-H layers at least one；

RLC-H layers, for the PDCP PDU processing to receiving, RLC PDU are obtained, and RLC PDU are sent at least One RLC-L layers, wherein an every RLC-H layers of correspondence is RLC-L layers at least one；

RLC-L layers, the RLC PDU processing for will receive obtains RLC PDU or RLC PDU segmentations, and is sent to MAC layer, wherein one MAC layer of an every RLC-L layers of correspondence, each MAC layer corresponds to RLC-L layers at least one；

MAC layer obtains MAC PDU, and be sent to UE for handling RLC PDU or RLC the PDU segmentations received Side.

26. network side equipment according to claim 25, which is characterized in that at least two RLC-L of an every RLC-H layers of correspondence Layer.

27. network side equipment according to claim 26, which is characterized in that described RLC-H layers includes：

First routing module is sent respectively at least two for shunting RLC PDU, and by the RLC PDU after shunting RLC-L layers；Or

Secondary route module is sent respectively at least two for replicating RLC PDU, and by the RLC PDU after duplication RLC-L layers；Or

Third routing module is used to select a link from least both links, and RLC PDU is sent to the link of selection It is RLC-L layers corresponding.

28. network side equipment according to claim 25, which is characterized in that described PDCP layers includes：

First cache module, the high level data packet for will receive are handled, and obtain PDCP SDU, and PDCP SDU are deposited It is stored in caching；

First preprocessing module, for obtaining the first quantity PDCP SDU from the caching, to first quantity PDCP SDU processing distributes SN including for the first quantity PDCP SDU, obtains PDCP PDU；

First sending module, for PDCP PDU to be sent to RLC-H layers；

Complementary module, for when the second quantity MAC PDU quilts in the corresponding MAC PDU of the first quantity PDCP SDU When transmission, controls first preprocessing module and the first sending module works on.

29. network side equipment according to claim 28, which is characterized in that first quantity is true in the following ways It is fixed：

First quantity=N1 × GBR, wherein N1 is positive integer；Or

First quantity=N1 × PBR, wherein N1 is positive integer；Or

30. network side equipment according to claim 25, which is characterized in that described RLC-H layers includes：

Second cache module obtains RLC SDU, and RLC SDU are stored in for the PDCP PDU processing to receiving In caching；

Second preprocessing module, for obtaining third quantity RLC SDU from the caching, and to the third quantity RLC SDU processing distributes SN including for the third quantity RLC SDU, obtains RLC PDU；

Second sending module, for RLC PDU to be sent to RLC-L layers；

Second complementary module, for as the 4th quantity MAC in the corresponding MAC PDU of the third quantity RLC SDU When PDU is sent, controls second preprocessing module and the second sending module works on.

31. network side equipment according to claim 30, which is characterized in that the third quantity is true in the following ways It is fixed：

Third quantity=N2 × GBR, wherein N2 is positive integer；Or

Third quantity=N2 × PBR, wherein N2 is positive integer；Or

32. network side equipment according to claim 25, which is characterized in that described RLC-L layers includes：

Cache module, the RLC PDU for will receive are stored in caching；

Sending module, for when the transmission opportunity of the MAC layer reaches, by the RLC PDU processing of caching, obtaining RLC PDU or RLC PDU segmentations, and it is sent to the MAC layer.

33. network side equipment according to claim 25, it is characterised in that：

It is RLC-H layers described, it is additionally operable to, in the packet loss state report for the rlc layer feedback for receiving the sides UE, determine the packet loss shape RLC PDU or RLC the PDU segmentations that the needs specified in state report retransmit；Obtain PDU points of RLC PDU or RLC for needing to retransmit Section, and it is sent to RLC-L layers；

The MAC layer is additionally operable to handle RLC PDU or RLC the PDU segmentations that the needs received retransmit, obtain MAC PDU, and it is sent to the sides UE.

34. network side equipment according to claim 33, which is characterized in that the RLC PDU or RLC for needing to retransmit In PDU segmentations and/or RLC-H layer with RLC-L layers of interface message include being used to indicate current RLC PDU or RLC PDU divide The label that section is wrapped for re-transmission.

35. network side equipment according to claim 34, which is characterized in that at least two RLC-L of an every RLC-H layers of correspondence Layer,

It is RLC-H layers described, it is additionally operable to the link for selecting a link circuit condition to be better than other links from least both links, and will The link that RLC PDU are sent to selection is RLC-L layers corresponding.

36. network side equipment according to claim 34, it is characterised in that：

It is RLC-L layers described, it is additionally operable to when receiving RLC PDU or RLC the PDU segmentations that the needs retransmit, it preferentially will be described RLC PDU or RLC the PDU segmentations retransmitted are needed to be sent to the MAC layer.

37. according to claim 25-36 any one of them network side equipments, which is characterized in that

The network side equipment is applied to the wireless-transmission network of CU-DU frameworks, and described PDCP layers and described RLC-H layers is located at CU In；Described RLC-L layers is located at MAC layer in DU；Or

The network side equipment is applied to the wireless-transmission network of NR dual links or multi-connection framework, described PDCP layer with it is described RLC-H layers are located in MeNB；Or

The network side equipment is applied to the wireless-transmission network of NR-LTE interworking frameworks, described PDCP layers and institute RLC-H layers are stated to be located in NR MeNB.

38. a kind of user equipment, which is characterized in that including：

MAC layer obtains RLC PDU or RLC PDU segmentations, and be sent to correspondence for the MAC PDU processing to receiving Rlc layer, wherein each rlc layer corresponds to multiple MAC layers；

Rlc layer, RLC PDU or RLC the PDU segmentations for being sent to the different MAC layers received carry out integrated treatment, obtain Complete RLC PDU, and PDCP PDU are obtained from complete RLC PDU, and PDCP PDU are sent to PDCP layers, wherein Each rlc layer corresponds to a PDCP layers, at least one rlc layer of an every PDCP layers of correspondence；

39. according to the user equipment described in claim 38, it is characterised in that：

The rlc layer is additionally operable to be ranked up RLC PDU or RLC the PDU segmentations that the different MAC layers received are sent, root Packet loss is judged whether according to ranking results, and when there are packet loss, packet loss state report is sent to the RLC-H layers of network side.

40. user equipment according to claim 39, it is characterised in that：

The rlc layer is additionally operable to the sequence number according to RLC PDU or RLC the PDU segmentations received, to the RLC received PDU or RLC PDU segmentations are ranked up, and judge whether RLC PDU or RLC the PDU segmentations of sequence number missing；Work as presence When RLC PDU or RLC the PDU segmentations of sequence number missing, start the timer that reorders；When the timer expiry that reorders, do not connect yet When receiving RLC PDU or RLC the PDU segmentations of the sequence number missing, there are packet losses for judgement.

41. a kind of user equipment, which is characterized in that including：

PDCP layers, for handling the high level data packet received, PDCP PDU are obtained, and be sent to rlc layer, wherein At least one rlc layer of an every PDCP layers of correspondence；

MAC layer obtains MAC PDU, and be sent to network for handling RLC PDU or RLC the PDU segmentations received Side.

42. user equipment according to claim 41, it is characterised in that：

The rlc layer determines the packet loss shape when being additionally operable to receive the packet loss state report of the RLC-H layers feedback of network side RLC PDU or RLC the PDU segmentations that the needs specified in state report retransmit；Obtain PDU points of RLC PDU or RLC for needing to retransmit Section, and it is sent to MAC layer；

The MAC layer is additionally operable to handle RLC PDU or RLC the PDU segmentations that the needs received retransmit, obtain MAC PDU, and it is sent to network side.

43. user equipment according to claim 42, it is characterised in that：

The rlc layer is additionally operable to obtain the link of nearest ascending resource, and will need PDU points of the RLC PDU or RLC that retransmit Section is sent to the corresponding MAC layer of link of the nearest ascending resource.

44. a kind of network side equipment, which is characterized in that including：

MAC layer obtains RLC PDU or RLC PDU segmentations, and be sent to correspondence for the MAC PDU processing to receiving RLC-L layers, wherein each MAC layer corresponds to RLC-L layers at least one, one MAC layer of an every RLC-L layers of correspondence；

RLC-L layers, RLC PDU or RLC the PDU segmentations for will receive pass through RLC-H layers corresponding, wherein each RLC-H layers of correspondence are RLC-L layers at least one；

It RLC-H layers, is handled for the RLC PDU or RLC PDU segmentation to receiving, obtains complete RLC PDU, and from PDCP PDU are obtained in complete RLC PDU, and PDCP PDU are sent to the PDCP layers of the network side, wherein every RLC Layer is a PDCP layers corresponding, and an every PDCP layers of correspondence is RLC-H layers at least one；

45. network side equipment according to claim 44, which is characterized in that at least two RLC-L of an every RLC-H layers of correspondence Layer,

It is RLC-H layers described, it is additionally operable to carry out General Office to RLC PDU or RLC the PDU segmentations for receiving different RLC-L layers of transmissions Reason, obtains complete RLC PDU.

46. network side equipment according to claim 45, it is characterised in that：

It is RLC-H layers described, it is additionally operable to be ranked up RLC PDU or RLC the PDU segmentations for receiving different RLC-L layers of transmissions, Packet loss is judged whether according to ranking results, and when there are packet loss, packet loss state report is sent to the rlc layer of the sides UE.

47. network side equipment according to claim 46, it is characterised in that：

It is RLC-H layers described, it is additionally operable to the sequence number according to RLC PDU or RLC the PDU segmentations received, to the RLC received PDU or RLC PDU segmentations are ranked up, and judge whether RLC PDU or RLC the PDU segmentations of sequence number missing；Work as presence When RLC PDU or RLC the PDU segmentations of sequence number missing, start the timer that reorders；When the timer expiry that reorders, do not connect yet When receiving RLC PDU or RLC the PDU segmentations of the sequence number missing, there are packet losses for judgement.

48. according to claim 44-47 any one of them network side equipments, which is characterized in that